Add blink-side binding code and tests for ServiceWorker -> Document postMessage (3/3)

Source/modules/serviceworkers/Client.cpp

Index: Source/modules/serviceworkers/Client.cpp
diff --git a/Source/modules/serviceworkers/Client.cpp b/Source/modules/serviceworkers/Client.cpp
index 77890687d12702f277cc362f647c92579bbcdb0d..1ddf95d3fd1dde0036d52cafb1f0755641f3bcab 100644
--- a/Source/modules/serviceworkers/Client.cpp
+++ b/Source/modules/serviceworkers/Client.cpp
@@ -5,6 +5,10 @@
 #include "config.h"
 #include "modules/serviceworkers/Client.h"
 
+#include "bindings/v8/ExceptionState.h"
+#include "bindings/v8/SerializedScriptValue.h"
+#include "modules/serviceworkers/ServiceWorkerGlobalScopeClient.h"
+#include "public/platform/WebString.h"
 #include "wtf/RefPtr.h"
 
 namespace WebCore {
@@ -24,4 +28,16 @@ Client::~Client()
 {
 }
 
+void Client::postMessage(ExecutionContext* context, PassRefPtr<SerializedScriptValue> message, const MessagePortArray* ports, ExceptionState& exceptionState)
+{
+    // Disentangle the port in preparation for sending it to the remote context.
+    OwnPtr<MessagePortChannelArray> channels = MessagePort::disentanglePorts(ports, exceptionState);
+    if (exceptionState.hadException())
+        return;
+
+    blink::WebString messageString = message->toWireString();
+    OwnPtr<blink::WebMessagePortChannelArray> webChannels = MessagePort::toWebMessagePortChannelArray(channels.release());
+    ServiceWorkerGlobalScopeClient::from(context)->postMessageToClient(m_id, messageString, webChannels.release());
+}
+
 } // namespace WebCore